fastdfs文件上传java--根据网络io流上传-避免Connection reset by peer: socket write error

来源：互联网发布：有哪些编程软件编辑：程序博客网时间：2024/06/08 02:42

1：添加依赖

 <dependency>            <groupId>net.oschina.zcx7878</groupId>            <artifactId>fastdfs-client-java</artifactId>            <version>1.27.0.0</version>        </dependency>

2：配置config.conf 里面可以只配置tracker的地址和端口

tracker_server=192.168.0.180:22122

3：编写代码

3.1编写UploadFileSender 继承 UploadCallback。其实：根据路径上传时，StorageClient也是根据路径，生成了UploadCallback的实现类：UploadBuff，这个类是StorageClient的静态内部类

class UploadFileSender implements UploadCallback {    private InputStream inStream;    public UploadFileSender(InputStream inStream) {        this.inStream = inStream;    }    public int send(OutputStream out) throws IOException {        byte[] bs = new byte[1024];        int i=0;        try{            while ((i = inStream.read(bs)) != -1) {                    out.write(bs, 0, i);                            }            out.flush();        }catch (Exception e){            e.printStackTrace();        }        return 0;    }}

3.2：编写上传代码

// 2、初始化全局配置。加载一个配置文件。            ClientGlobal.init("client.conf");            // 3、创建一个TrackerClient对象。            TrackerClient trackerClient = new TrackerClient();            // 4、创建一个TrackerServer对象。            TrackerServer trackerServer = trackerClient.getConnection();            // 5、声明一个StorageServer对象，null。            StorageServer storageServer = null;            // 6、获得StorageClient对象。            StorageClient storageClient = new StorageClient(trackerServer, storageServer);            // 7、直接调用StorageClient对象方法上传文件即可。            URL url = new URL("http://a.hiphotos.baidu.com/image/pic/item/0e2442a7d933c895e97204b1d81373f0830200ef.jpg");//65536//            URL url = new URL("http://localhost:8080/dd/dddd.jpg");//65536            HttpURLConnection conn = (HttpURLConnection) url.openConnection();            //设置超时间为3秒            conn.setConnectTimeout(3 * 1000);            //防止屏蔽程序抓取而返回403错误            conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");            int fileLength = conn.getContentLength();//重要：网络文件的大小            //得到输入流            InputStream inputStream = conn.getInputStream();            NameValuePair[] metaList = new NameValuePair[3];            metaList[0] = new NameValuePair("fileName", "dddddd.jpg");            metaList[1] = new NameValuePair("fileExtName", "jpg");            metaList[2] = new NameValuePair("fileLength", String.valueOf(fileLength));                       UploadFileSender us = new UploadFileSender(inputStream);            String[] strings = storageClient.upload_file(null,fileLength,us, "jpg", metaList);            for (String string : strings) {                System.out.println(string);            }

注意：

int fileLength = conn.getContentLength();//重要：网络文件的大小

网络io流和本地io流不同。网路io流inputStream.available();获取不了文件大小。返回值要比真实文件小。会报：

Connection reset by peer: socket write error错误

注意：要设置文件大小。storageClient会根据大小来关闭输出流

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